Dolphins is 45 pages of interesting facts accompanied by stunning photographs of various species of dolphins in captivity and the wild.  The book is well-written and interesting, perfect for a student report.  The index and glossaries are helpful features.  I would have liked to see a page that showed a photograph of each of the 37 species of dolphins along with a few basic facts.  A world map that indicates the range of each species would also compliment this book well.